I hope that you are a member of BALPA or the IPA because if the CAA think that they have a case then they will try to do you if they can and defending your self can be very expencive.
The up side to all this is that the CAA have a poor record of winning these cases.
The biggest problem is that the CAA seem unable to see a piece of fabricated evidedce from the real thing , I was able to watch Mr Owen make them all look like fools in court during the flying instructor EFATO case some time back when it was cristal clear to all but the CAA that the witnesses had fabricated the whole thing because they did not like the aircraft flying near thair houses.
The biggest problem for you is that unlike the CAA if you win you will not be able to recover all your costs , hence I hope that you have some type of leagal cover.